type Comment struct {
    ID      int       `json:";id"`
    Author  string    `json:"author"`
    Content string    `json:"content"`
    Created time.Time `json:"created"`
}

func main() {
    http.HandleFunc("/comments", getComments)
    http.HandleFunc("/comments/add", addComment)
    
    fmt.Println("Server is running on :8080")
    http.ListenAndServe(":8080", nil)
}

var comments []Comment

func getComments(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "application/json")
    json.NewEncoder(w).Encode(comments)
}

func addComment(w http.ResponseWriter, r *http.Request) {
    if r.Method != "POST" {
        http.Error(w, "Only POST allowed", http.StatusMethodNotAllowed)
        return
    }

    var newComment Comment
    if err := json.NewDecoder(r.Body).Decode(&newComment); err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }

    newComment.ID = len(comments) + 1
    newComment.Created = time.Now()
    comments = append(comments, newComment)

    w.Header().Set("Content-Type", "application/json")
    w.WriteHeader(http.StatusCreated)
    json.NewEncoder(w).Encode(newComment)
}

db, _ := sql.Open("sqlite3", "./comments.db")
_, err := db.Exec(`CREATE TABLE IF NOT EXISTS comments (
    id INTEGER PRIMARY KEY,
    author TEXT,
    content TEXT,
    created DATETIME
)`)

<form onsubmit="addComment()">
  <input type="text" id="author" placeholder="你的名字" required>
  <textarea id="content" placeholder="写点什么..." required></textarea>
  <button type="submit">发表评论</button>
</form>
<div id="list"></div>

<script>
function addComment() {
  // 提交逻辑...
}
</script>